Cascading Combo Box - help needed please.
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From: Joe on 7 May 2010 03:30 I have 3 dependent combo boxes. CboService has TblService as RowSource with bound col = 2; col count = 2; col width 0cm;2cm and the following code in after update... Private Sub CboService_AfterUpdate() On Error Resume Next Select Case CboService.Value Case "A" CboRank.RowSource = "TblA" Case "B" CboRank.RowSource = "TblB" Case "C" CboRank.RowSource = "TblC" End Select End Sub CboRank has bound col = 1; col count = 2; col width 0cm;2.5cm and the following code in the after update event... Private Sub CboRank_AfterUpdate() On Error Resume Next Select Case CboRank.Value Case "B1" CboFunction.RowSource = "TblFunction" Case "B3" CboFunction.RowSource = "TblFunction" Case "B7" CboFunction.RowSource = "TblFunction" End Select End Sub CboFunction has bound col = 1; col count = 3; col width 0cm; 2.5cm; 0cm Combos 1&2 populate without any problem however I just can't seem to be able to get combo 3 to populate. I would be very grateful for any help and if there is a better way to write the above code I would appreciate the advice. Many thanks, Joe -- Joe
From: Arvin Meyer [MVP] on 7 May 2010 06:51 I think because none of the Cases are matching for cboRank, and since all of the values sought are TblFunction anyway, why would you even want a Case statement? -- Arvin Meyer, MCP, MVP http://www.datastrat.com http://www.accessmvp.com http://www.mvps.org/access "Joe" <Joe(a)discussions.microsoft.com> wrote in message news:DE80DA07-59FF-4822-A2EC-BD751D26DB82(a)microsoft.com... >I have 3 dependent combo boxes. > > CboService has TblService as RowSource with bound col = 2; col count = 2; > col width 0cm;2cm and the following code in after update... > Private Sub CboService_AfterUpdate() > On Error Resume Next > Select Case CboService.Value > Case "A" > CboRank.RowSource = "TblA" > Case "B" > CboRank.RowSource = "TblB" > Case "C" > CboRank.RowSource = "TblC" > End Select > End Sub > > CboRank has bound col = 1; col count = 2; col width 0cm;2.5cm and the > following code in the after update event... > Private Sub CboRank_AfterUpdate() > On Error Resume Next > Select Case CboRank.Value > Case "B1" > CboFunction.RowSource = "TblFunction" > Case "B3" > CboFunction.RowSource = "TblFunction" > Case "B7" > CboFunction.RowSource = "TblFunction" > End Select > End Sub > CboFunction has bound col = 1; col count = 3; col width 0cm; 2.5cm; 0cm > > Combos 1&2 populate without any problem however I just can't seem to be > able > to get combo 3 to populate. > > I would be very grateful for any help and if there is a better way to > write > the above code I would appreciate the advice. > > Many thanks, > > Joe > -- > Joe
From: Joe on 7 May 2010 08:59 Thanks Arvin - I think I see what you mean however I'm unsure how to achieve the solution to my problem. Of the three services available for selection in the first combo, one selection (B) must also have a specific role (function) attached to some but not all of the ranks in combo2. I had hoped that this could be achieved using cascading combo boxes. -- Joe "Arvin Meyer [MVP]" wrote: > I think because none of the Cases are matching for cboRank, and since all of > the values sought are TblFunction anyway, why would you even want a Case > statement? > -- > Arvin Meyer, MCP, MVP > http://www.datastrat.com > http://www.accessmvp.com > http://www.mvps.org/access > > > "Joe" <Joe(a)discussions.microsoft.com> wrote in message > news:DE80DA07-59FF-4822-A2EC-BD751D26DB82(a)microsoft.com... > >I have 3 dependent combo boxes. > > > > CboService has TblService as RowSource with bound col = 2; col count = 2; > > col width 0cm;2cm and the following code in after update... > > Private Sub CboService_AfterUpdate() > > On Error Resume Next > > Select Case CboService.Value > > Case "A" > > CboRank.RowSource = "TblA" > > Case "B" > > CboRank.RowSource = "TblB" > > Case "C" > > CboRank.RowSource = "TblC" > > End Select > > End Sub > > > > CboRank has bound col = 1; col count = 2; col width 0cm;2.5cm and the > > following code in the after update event... > > Private Sub CboRank_AfterUpdate() > > On Error Resume Next > > Select Case CboRank.Value > > Case "B1" > > CboFunction.RowSource = "TblFunction" > > Case "B3" > > CboFunction.RowSource = "TblFunction" > > Case "B7" > > CboFunction.RowSource = "TblFunction" > > End Select > > End Sub > > CboFunction has bound col = 1; col count = 3; col width 0cm; 2.5cm; 0cm > > > > Combos 1&2 populate without any problem however I just can't seem to be > > able > > to get combo 3 to populate. > > > > I would be very grateful for any help and if there is a better way to > > write > > the above code I would appreciate the advice. > > > > Many thanks, > > > > Joe > > -- > > Joe > > > . >
From: Arvin Meyer [MVP] on 7 May 2010 14:04 It might be simpler than that. Have a look at my sample for listboxes, which works the very same as a combo box: http://accessmvp.com/Arvin/Combo.zip -- Arvin Meyer, MCP, MVP http://www.datastrat.com http://www.accessmvp.com http://www.mvps.org/access "Joe" <Joe(a)discussions.microsoft.com> wrote in message news:9811C840-0529-4125-ABC1-05BE6E09A97D(a)microsoft.com... > Thanks Arvin - I think I see what you mean however I'm unsure how to > achieve > the solution to my problem. Of the three services available for selection > in > the first combo, one selection (B) must also have a specific role > (function) > attached to some but not all of the ranks in combo2. I had hoped that this > could be achieved using cascading combo boxes. > -- > Joe > > > "Arvin Meyer [MVP]" wrote: > >> I think because none of the Cases are matching for cboRank, and since all >> of >> the values sought are TblFunction anyway, why would you even want a Case >> statement? >> -- >> Arvin Meyer, MCP, MVP >> http://www.datastrat.com >> http://www.accessmvp.com >> http://www.mvps.org/access >> >> >> "Joe" <Joe(a)discussions.microsoft.com> wrote in message >> news:DE80DA07-59FF-4822-A2EC-BD751D26DB82(a)microsoft.com... >> >I have 3 dependent combo boxes. >> > >> > CboService has TblService as RowSource with bound col = 2; col count = >> > 2; >> > col width 0cm;2cm and the following code in after update... >> > Private Sub CboService_AfterUpdate() >> > On Error Resume Next >> > Select Case CboService.Value >> > Case "A" >> > CboRank.RowSource = "TblA" >> > Case "B" >> > CboRank.RowSource = "TblB" >> > Case "C" >> > CboRank.RowSource = "TblC" >> > End Select >> > End Sub >> > >> > CboRank has bound col = 1; col count = 2; col width 0cm;2.5cm and the >> > following code in the after update event... >> > Private Sub CboRank_AfterUpdate() >> > On Error Resume Next >> > Select Case CboRank.Value >> > Case "B1" >> > CboFunction.RowSource = "TblFunction" >> > Case "B3" >> > CboFunction.RowSource = "TblFunction" >> > Case "B7" >> > CboFunction.RowSource = "TblFunction" >> > End Select >> > End Sub >> > CboFunction has bound col = 1; col count = 3; col width 0cm; 2.5cm; 0cm >> > >> > Combos 1&2 populate without any problem however I just can't seem to be >> > able >> > to get combo 3 to populate. >> > >> > I would be very grateful for any help and if there is a better way to >> > write >> > the above code I would appreciate the advice. >> > >> > Many thanks, >> > >> > Joe >> > -- >> > Joe >> >> >> . >>
From: Joe on 8 May 2010 03:52 Thanks Arvin. After I looked at your samples I decided to try and simplify my database amalgamating the three rank tables into one combined table with the following structure... TblRank RankID Autonum PK ServiceID FK Rank Text TblService ServiceID PK Service Text CboService has RowSource = TblService Bound Col = 1 Col Count = 2 Col Width = 0cm; 2cm CboRank has a blank RowSource Bound Col = 1 Col Count = 3 Col Width = 0cm;0cm;2.5cm I have changed the After Update for CboService to the following Code... Private Sub CboService_AfterUpdate() With Me![CboRank] If IsNull(Me!CboService) Then .RowSource = "" Else .RowSource = "SELECT [Rank] " & _ "FROM tblRank " & _ "WHERE [ServiceID]= " & Me!CboService End If Call .Requery End With End Sub The trouble is that whereas I could previously get a population of CboRank from a selection in CboService now I get a blank list on opening CboRank. I'm not sure where I've gone wrong but your guidance would be appreciated. -- Joe "Arvin Meyer [MVP]" wrote: > It might be simpler than that. Have a look at my sample for listboxes, which > works the very same as a combo box: > > http://accessmvp.com/Arvin/Combo.zip > -- > Arvin Meyer, MCP, MVP > http://www.datastrat.com > http://www.accessmvp.com > http://www.mvps.org/access > > > "Joe" <Joe(a)discussions.microsoft.com> wrote in message > news:9811C840-0529-4125-ABC1-05BE6E09A97D(a)microsoft.com... > > Thanks Arvin - I think I see what you mean however I'm unsure how to > > achieve > > the solution to my problem. Of the three services available for selection > > in > > the first combo, one selection (B) must also have a specific role > > (function) > > attached to some but not all of the ranks in combo2. I had hoped that this > > could be achieved using cascading combo boxes. > > -- > > Joe > > > > > > "Arvin Meyer [MVP]" wrote: > > > >> I think because none of the Cases are matching for cboRank, and since all > >> of > >> the values sought are TblFunction anyway, why would you even want a Case > >> statement? > >> -- > >> Arvin Meyer, MCP, MVP > >> http://www.datastrat.com > >> http://www.accessmvp.com > >> http://www.mvps.org/access > >> > >> > >> "Joe" <Joe(a)discussions.microsoft.com> wrote in message > >> news:DE80DA07-59FF-4822-A2EC-BD751D26DB82(a)microsoft.com... > >> >I have 3 dependent combo boxes. > >> > > >> > CboService has TblService as RowSource with bound col = 2; col count = > >> > 2; > >> > col width 0cm;2cm and the following code in after update... > >> > Private Sub CboService_AfterUpdate() > >> > On Error Resume Next > >> > Select Case CboService.Value > >> > Case "A" > >> > CboRank.RowSource = "TblA" > >> > Case "B" > >> > CboRank.RowSource = "TblB" > >> > Case "C" > >> > CboRank.RowSource = "TblC" > >> > End Select > >> > End Sub > >> > > >> > CboRank has bound col = 1; col count = 2; col width 0cm;2.5cm and the > >> > following code in the after update event... > >> > Private Sub CboRank_AfterUpdate() > >> > On Error Resume Next > >> > Select Case CboRank.Value > >> > Case "B1" > >> > CboFunction.RowSource = "TblFunction" > >> > Case "B3" > >> > CboFunction.RowSource = "TblFunction" > >> > Case "B7" > >> > CboFunction.RowSource = "TblFunction" > >> > End Select > >> > End Sub > >> > CboFunction has bound col = 1; col count = 3; col width 0cm; 2.5cm; 0cm > >> > > >> > Combos 1&2 populate without any problem however I just can't seem to be > >> > able > >> > to get combo 3 to populate. > >> > > >> > I would be very grateful for any help and if there is a better way to > >> > write > >> > the above code I would appreciate the advice. > >> > > >> > Many thanks, > >> > > >> > Joe > >> > -- > >> > Joe > >> > >> > >> . > >> > > > . >
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